Molding machine for plastic substances



June 13, 1939. A. w. SIZER MOLDING MACHINE FOR PLASTIC SUBSTANCES 3 Sheets-Sheet 1 Filed Dec. 13, 1938 i U m n a E WRW Illl... ||m 8 W. E mm fi/N l m V 4 {:41} In: I i V ,1 v X B n m 6 m n B m m -uu llll l lllllrilil 5 m n 3 F H a June13,1939. A. w. SIZER 2,162,647

' MOLDING MACHINE FOR PLASTIC SUBSTANCES Filed Dec. 13, 19 38 3 Sheets-Sheet 2 w vvvvvvvvvvvvvvvvvvv vv Ml 1g Attorney June 13, 1939. A. w. SIZER MOLDING MACHINE FOR PLASTIC SUBSTANCES Filed Dec. 13, 1938 3 Sheets-Sheet 3 Attorney Patented June 13, 1939 MOLDING MACHINE FOR PLASTIC SUBSTANCES Albert William Siser. Hesslc, Kingston upon Hull, England Application December 18. 1938. Serial No. 245.525

In Great Britain November 28, 1988 8 Claims.

The present invention relates to an improved molding machine for the molding oi cakes. pellets or the like from plastic material such for instance as the manufacture of cakes or pellets from meals or meal mixtures and of the type in which the meal is led to a space between a roller and a die plate moving relatively to one another so that the meal is forced through the perforations in the die plate and is cut oil in the form of cakes or pellets on the opposite side thereof.

According to the present invention means are provided to drive one or more rollers oppositely to a die plate usually at equal peripheral speeds.

Means may be provided to vary the quantity of meal ied per unit time to the area oi the die plate in advance of the cooperating roller.

The invention is more particularly described with reicrence to the accompanying drawings in which:-

Figure l is a side elevation of one form of construction.

Figure 2 is a detailed view on a large scale showing the feed mechanism.

Figure 8 is a plan view of the line A-A of Fi ure 2.

Figure 4 is a section of the line BB oi Figure 3.

A pair of bevel wheels i, 2 are driven from a common driving shaft 8 in opposite directions one bevel wheel i being kcycd to sleeve 4 101' driving a die plate 5 in one direction oi rotation whilst the bevel wheel 2 is keyed to a shaft I driving a spider 1 carrying bearings for a number of rollers l to rotate this in the opposite direction to the die plate 5.

Meal from a kettle 9 passes to a trough in formed in the upper part of the spider] which trough has holes il which may be masked to a greater or lesser extent by a ported masking plate ii which has tommy holes i2 in it so that on the release of a locking ring it this plate ii can be turned to any desired position of adjustment whereby the amount of meal passing through the holes it can be adjusted as desired and thus the feed to the die plate ahead of any individual roller I can be adjusted to suit the cross sectional area oi the perforations in the die plate I cooperating therewith. Fixed stirrer bars or stralles ll serve to assist the feeding of the meal through the holes ll.

The die plate 5 further cooperates with rotating cutting blades ill for severing the cakes or pellets which can then fall upon a tray i6 and be delivered down a chute ii.

The blades it are mounted on a sleeve l8 carrying an inter ii nally toothed ring 20 driven by toothed wheel 2i on a spindle 22 carrying also toothed wheel 28 driven by a toothed ring 24 keyed to the sleeve 4.

Normally the spider l and die plate I will be rotated in opposite directions at equal speeds. but if desired they may be rotated in opposite directions at different speeds.

I declare that what I claim is:

l. A molding machine for plastic substances comprising in combination an annular die plate. a sleeve driving said die plate, a roller in rolling contact with one side of said die plate. a cage carrying said roller, a driving shalt guided coaxially in said sleeve and driving said cage. a common driving means for said shaft and said sleeve. means to feed meal to the die plate ahead or said roller and means on the opposite side of form oi pellets.

said die plate to sever extruded meal in the 2. A molding machine for plastic substances comprising in combination an annular die plate. a sleeve driving said die plate. a roller in rolling contact with one side of said die plate. a cage carrying said roller. a driving shalt guided coaxialiy in said sleeve and driving said cage. a common driving means for said shalt and said sleeve, a trough carried on said cage and having an opening in its base for the feeding of meal ahead oi said roller and a ilxed scraper cooperating with the base of said trough.

8. A molding machine for plastic substances comprising in combination an annular die plate. a sleeve driving said die plate. a roller in rolling contact with one side of said die plate. a cage carrying said roller, a driving shalt guided coaxially in said sleeve and driving said cage, a common driving means for said shaft and said sleeve. a trough carried on said cage and having an opening-in its base to feed meal to the die late ahead 0! said roller, a perforated masking plate carried on said trough and adjustable relatively thereto to control the sire of said opening. and a iixed scraper cooperating with said masking plate. 

